<template>
  <div>
    <div class="searchInput">
      <input type="text" placeholder="请输入城市名或拼音"
             v-model="keyword"
      >
    </div>
    <div class="searchCity" ref="wrapper" v-show="keyword">
      <ul>
        <li
          v-for="item of list"
          :key="item.id"
          class="border-bottom"
          @click="choiceCity(item.name)"
        >
          {{item.name}}
        </li>
        <li v-show="noData">没有找到相关信息</li>
      </ul>
    </div>
  </div>
</template>
<script>
  import BScroll from 'better-scroll'
export default {
  name : 'CitySearch',
  props: {
    cities : Object
  },
  data () {
     return {
       keyword:'',
       timer: null,
       list: [],
     }
   },
  methods: {
    choiceCity (city) {
      this.$store.dispatch('changeCity',city);
      this.$router.push('/')
    }
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.wrapper)

  },
  computed : {

      noData (){
        return !this.list.length
    }
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.wrapper, { mouseWheel: true, click: true, tap: true })
  },
  watch : {
    keyword () {
      if(!this.keyword){
        this.list = [];
        return
      }
      if(this.timer){
        clearTimeout(this.timer)
      }
      this.timer = setTimeout(( )=>{
        const result = [];
        for(let i in this.cities){
            this.cities[i].forEach((value)=>{
              if(value.spell.indexOf(this.keyword)>-1||value.name.indexOf(this.keyword)>-1){
                 result.push(value)
               }
             })
           }
        return this.list = result;
      },100)
    }
  }

}
</script>
<style scoped>
  .searchInput {
    width: 100%;
    height: 35px;
    background-color: greenyellow;
  }
  .searchInput input {
    margin-top: 4px;
    width: 94%;
    height: 26px;
    text-align: center;
    line-height: 30px;
    margin-left: 3%;
    border-radius: 4px;
    padding:0 26px;
    box-sizing: border-box;
    outline:none;
    boreder:0;
  }
  .searchCity {
    position: absolute;
    width: 100%;
    top: 95px;
    left: 0;
    bottom: 0;
    background-color: #cccccc;
    z-index: 1;
    overflow: hidden;
  }
  .searchCity ul li {
    line-height: 35px;
    padding-left: 5px;
    background-color: white;
  }
</style>
